Oakland Raiders running back Marcel Reece (45) runs for a first down against Detroit Lions John Wendling (29) in the first quarter at the O.co Coliseum in Oakland, Calif. on Sunday, December 18, 2011. (Nhat V. Meyer/Mercury News)

Moore, who began practicing only last week because of a hamstring strain suffered Aug. 5 in Napa, was one of seven players designated as inactive for the season opener against the San Diego Chargers.

With the Raiders best deep threat watching from the sidelines, the Raiders threw mostly short passes and in the end came up short in a 22-14 loss to San Diego at O.co Coliseum.

"I think any time you don't have one of your better players it's something you have to try to work to overcome," Allen said. "He was very close. He probably could have played in the game, but I chose not to play him because it's a long season and we have 15 more of these games left to play. I wanted to make sure we had him healthy for the majority of the season."

Rod Streater, the undrafted rookie free agent out of Temple, started in place of Moore alongside Darrius Heyward-Bey. Streater caught four passes for 27 yards, including a 2-yard touchdown pass and a 2-point conversion in the final minute.

Streater also lost a fumble on his first reception, ending a promising 14-play, 56-yard drive on the Raiders' first series.

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Starting from Moore's first appearance at practice Wednesday, Allen maintained Moore would be a "game time decision."

Moore had some of his most productive performances as a rookie against the Chargers, catching five passes for 123 yards and two touchdowns in the Raiders' 24-17 win in San Diego and three receptions for 101 yards in a 38-26 loss in Oakland to end the season.

Ford was not present at the game, and Allen had no update on the condition of Ford's injured left foot.

Pryor's appearance on the inactive list ruled out any opportunity for offensive coordinator Greg Knapp to utilize any wildcat or trick formations and left Matt Leinart as the lone option should starter Carson Palmer be injured.

Cornerback Ron Bartell left the game in the first half with a shoulder injury and did not return. Allen said he did not have an update on Bartell's condition or know how long he would be out.

Bartell was the victim of two perfectly thrown passes by Philip Rivers, a 46-yard pass to Robert Meachem and a 25-yarder to Malcom Floyd.

Defensive tackle Tommy Kelly drew two offsides penalties -- a problem he's had throughout his career -- but Allen said he wasn't thinking about pulling him from the game.

"He knows that's unacceptable and we can't have those," Allen said. "It looked like he was able to get that corrected throughout the rest of the game."

Oakland finished with six penalties for 35 yards, an improvement overall for a team that set NFL records for penalties and penalty yardage a year ago.

"Penalties weren't what cost us the football game," Allen said. "It was the self-inflicted wounds of turning the ball over and giving them the ball at our end of the field."

The Raiders went 14 minutes before getting their first flag, a personal foul for unnecessary roughness against Keenan Clayton on a Chargers kickoff.

Fullback Marcel Reece will sign a contract extension, according to a CBS Sports report.

Reece was scheduled to make $540,000 this season. He missed some of the Raiders' offseason workouts while waiting to sign his exclusive rights tender, eventually signing and reporting.

Running back Darren McFadden caught a career-high 13 passes -- second in franchise history to Tim Brown's 14 in 1997 -- for 86 yards but managed only 32 yards rushing on 15 carries.

Having nearly as many receptions as runs "might be a first for me," McFadden said, adding he was fine with however he got the ball in his hands.

"I feel like they outplayed us," McFadden said. "They did a great job. I feel like we made a lot of mistakes that were shooting us in the foot and stopped us from moving the ball. We have to come back Wednesday ready to do some more work."

Alex Parsons started at center ahead of projected starter Stefen Wisniewski, who has been slowed by a calf strain which cost him two weeks of practice.

Parsons is the sixth player to start a season at center for the Raiders in the last six years, following Samson Satele (2011), Jared Veldheer (2010), Chris Morris (2009), Jake Grove (2008) and Jeremy Newberry (2007).

Grove, also a starter in 2005 and 2006, is the last Raiders player to start consecutive seasons at center.

Heyward-Bey made the 100th reception of his career with a 9-yard catch from Palmer on Oakland's opening drive. He finished with three receptions for 43 yards.

The Raiders lost 25 yards on a first-half play when Reece attempted a flip on a reverse to Taiwan Jones, with the ball coming in high and bouncing to the ground. Jones chased the ball backward and fell on it, aborting the drive.

Jones also mishandled his first kickoff attempt and was stopped at the 14-yard line.

A moment of silence was observed for Kenyon Youngstrom, Tom Keating and Art Modell before the national anthem.

Youngstrom is the California Highway Patrol officer who was shot and killed in the line of duty last week along Interstate 680 in Alamo. He previously sold Raiders tickets for the now-defunct Oakland Football Marketing Association.

Modell, owner of the Cleveland Browns before moving the team to Baltimore as the Ravens, was recognized throughout the league after dying last week.

Keating, a Raiders tackle from 1966-72, died two weeks shy of his 70th birthday last week.